Foidolite and Variolite Definition

Definition of Foidolite and Variolite

The general Foidolite and Variolite definition can be stated as: Foidolite is a rare type of coarse-grained intrusive igneous rock with a feldspathoid mineral content greater than 60%. On the other hand, Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. Along with definition of Foidolite and Variolite, get to know about Properties of Foidolite and Variolite. Get to know more information about Foidolite and Variolite origin and discoverer, etymology and class.

History of Foidolite and Variolite

The history of Foidolite and Variolite gives information about where the rock was found and who was its discoverer. Almost each and every aspect of Earth's history is recorded in rocks be it the volcanoes which were erupted or the plants, animals and organisms which are now extinct, as rocks are present from millions of years.

Foidolite and Variolite Origin and Discoverer

Foidolite and Variolite definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Foidolite and Variolite. In this section, you will know about Foidolite and Variolite Origin and Discoverer. Origin of Foidolite is Unknown whereas Origin of Variolite is France. It is interesting to know the name of Foidolite and Variolite discoverer. The discoverer of Foidolite and Variolite are Unknown.

Etymology of Foidolite and Variolite

Along with Foidolite and Variolite definition, know more about the etymology of Foidolite and Variolite. Etymology of Foidolite and Variolite gives information about origin and formation of a particular rock. Know more about Formation of Foidolite and Formation of Variolite. The etymology of Foidolite is From the mineral feldspathoid which is the main content of rock while that of Variolite is From the mineral feldspathoid which is the main content of rock. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Foidolite and Variolite belong to Igneous Rocks. The sub-class, group and other categories of Foidolite and Variolite are listed below.

For Foidolite,

• Sub-class: Durable Rock and Soft Rock
• Group: Plutonic
• Other Categories: Coarse grained rock, Fine grained rock, Medium grained rock and Opaque rock

For Variolite,

• Sub-class: Durable Rock and Hard Rock
• Group: Volcanic
• Other Categories: Opaque rock